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From "Jurriaan Mous (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-12597) Add RpcClient interface and enable changing of RpcClient implementation
Date Fri, 28 Nov 2014 13:30:12 GMT
Jurriaan Mous created HBASE-12597:

             Summary: Add RpcClient interface and enable changing of RpcClient implementation
                 Key: HBASE-12597
                 URL: https://issues.apache.org/jira/browse/HBASE-12597
             Project: HBase
          Issue Type: Improvement
          Components: Client
            Reporter: Jurriaan Mous

Currently HConnectionImplementation works with the included RpcClient which is a direct implementation
and not defined by an interface.

It would be great to be able to swap out the default RpcClient with another implementation
which can also be controlled by the default HConnectionImplementation. 

Suggested changes:
- Create a RpcClient interface which defines all the ways HConnectionImplementation interacts
with an RPC client. Like getting a blocking protobuf service interface or closing the client.
- Define which RpcClient implementation to construct by setting a configuration variable which
defaults to the current RpcClient.
- Possibly create an abstract RpcClient class to only load all the basic Rpc layer configurations
to be used in an implementation.

Why? It enables experimentation with RpcClients which could enable new features or could be
more performant than the included client. 
I created a new RpcClient implementation based on Netty which can also be called asynchronously.
It would be great to also be able to use this RpcClient in all the default ways and tests
to see if there are any issues with it. 


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